US4592445A - Suction device for chain saw - Google Patents

Suction device for chain saw Download PDF

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Publication number
US4592445A
US4592445A US06/775,834 US77583485A US4592445A US 4592445 A US4592445 A US 4592445A US 77583485 A US77583485 A US 77583485A US 4592445 A US4592445 A US 4592445A
Authority
US
United States
Prior art keywords
suction
chain saw
muffling
path
rear handle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/775,834
Other languages
English (en)
Inventor
Toshiharu Sawada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Zenoah Co
Original Assignee
Komatsu Zenoah Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Komatsu Zenoah Co filed Critical Komatsu Zenoah Co
Assigned to KOMATSU ZENOAH CO. reassignment KOMATSU ZENOAH CO. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SAWADA, TOSHIHARU
Application granted granted Critical
Publication of US4592445A publication Critical patent/US4592445A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/1017—Small engines, e.g. for handheld tools, or model engines; Single cylinder engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/0008—Means for carrying the chain saw, e.g. handles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1211—Flow throttling or guiding by using inserts in the air intake flow path, e.g. baffles, throttles or orifices; Flow guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1244—Intake silencers ; Sound modulation, transmission or amplification using interference; Masking or reflecting sound
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices

Definitions

  • the present invention relates to a suction device for a chain saw for sucking air in a suction port of a carburetor of an engine of the chain saw.
  • a suction chamber for accommodating a carburetor is partitioned with a filter element, and the carburetor communicates directly with atmosphere via the filter element. Since the chain saw is generally required to be made as compact as possible to provide convenient handling, it is impossible to provide for the chain saw a separate air cleaner having an elongated suction muffling path, or a separate suction muffler having a suction muffling path. As a result, the sound of suction air of the engine causes a noise which is undesirable for the health of an operator of the chain saw and is feared to cause noise pollution.
  • An object of the present invention is to provide a suction device for a chain saw, which is so constituted as to prevent the suction sound of the engine from propagating directly to the atmosphere.
  • Another object of the present invention is to provide a suction device for a chain saw, which is simple in construction.
  • a further object of the present invention is to provide a suction device for a chain saw, which is compact and can be accommodated within the chain saw so that a separate suction muffler or a separate air cleaner with a suction muffling path is not needed for the chain saw.
  • a suction device for a chain saw comprising a suction chamber communicating with a suction port of a carburetor, and a muffling path formed within a rear handle of the chain saw to pass through said handle and provide communication between the suction chamber and atmosphere so that suction noise is prevented from propagating outside by said compact and simple construction without providing separately a suction muffler or an air cleaner having a suction muffling path.
  • FIG. 1 is a perspective view showing a chain saw provided with a device according to the present invention.
  • FIG. 2 is a cross sectional side view showing an embodiment according to the present invention.
  • a forwardly projecting guide bar 3 is fixed to one side of a body casing 1.
  • a saw chain 5 is coupled freely slidable around the periphery of the guide bar 3.
  • a side cover 7 is fixed to the body casing 1 to cover the base portions of the guide bar 3 and the saw chain 5.
  • An opening (not shown) for pouring fuel into a fuel tank is provided at front upper part of the body casing 1, said opening being generally closed with a cap 9.
  • a muffler 11 is arranged on one side of the body casing 1.
  • a supporting body 13 of a box-like shape is attached to the upper surface of the body casing 1 through a vibration isolator (not shown) made of rubber, etc.
  • One end of a rear handle 15 and one end of a front handle 17 are fixed to the supporting body 13, and the other ends of the rear and front handles are supported by the body casing 1 via vibration isolators (not shown) made of rubber, etc.
  • a cover 19 is fixed removably to the upper part of the supporting body 13 with a screw handle 21.
  • An engine 23 is accommodated within the body casing 1.
  • a carburetor 31 is fixed to an intake opening 27 of a cylinder 25 of the engine 23 through a heat insulator 29.
  • a bracket 35 is fixed to the upper surface of the carburetor 31 by means of screws 33. The threaded portion of the screw handle 21 is screwed into the bracket 35 to fix the cover 19 thereto.
  • the bracket 35 is formed by bending a band shape plate.
  • a suction chamber 17 is formed within the supporting body 13 to surround the carburetor 31 and communicate with a suction port 36 of the carburetor 31.
  • a bored portion 39 located at the lower part of the suction chamber 37 to pass the heat insulator 29 is engaged with a seal 41 made of rubber, etc., for sealing said bored portion 39.
  • a chamber 45 on the cover 19 side with respect to the filter 43 communicates via a communicating bore 47 made through the cover 19 with a muffling path 49 provided through the rear handle 15 which is formed in one body with the supporting body 13.
  • the other end of the muffling path 49 is open to the atmosphere.
  • a throttle lever 51 is attached to the rear handle 15 with an axis 53, said lever 51 being freely pivotable around the axis 53 and coacting with a throttle device (not shown) of the carburetor 31 through a rod 55.
  • an operator grasps the front handle 17 and the rear handle 15 with his hands, starts to drive the engine 23 to rotate the saw chain 5 around the guide bar 3, and cuts a tree, etc., by the rotating saw chain 5.
  • air is sucked into the chamber 45 through the muffling path 49, drawn into the suction chamber 37 through the filter 43, and sucked into the suction port 36 of the carburetor 31.
  • the suction sound of the engine 23 is muffled by the interference with the internal wall of the elongated muffling path 49.
  • the suction chamber 37 and the rear handle 15 are formed in one body, the suction chamber 37 can be formed independently of the rear handle 15 and connected to the muffling path 49 provided within the rear handle 15 by means of a flexible pipe.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Exhaust Silencers (AREA)
US06/775,834 1984-09-26 1985-09-13 Suction device for chain saw Expired - Fee Related US4592445A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59-144271[U] 1984-09-26
JP1984144271U JPH0340564Y2 (lv) 1984-09-26 1984-09-26

Publications (1)

Publication Number Publication Date
US4592445A true US4592445A (en) 1986-06-03

Family

ID=15358205

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/775,834 Expired - Fee Related US4592445A (en) 1984-09-26 1985-09-13 Suction device for chain saw

Country Status (4)

Country Link
US (1) US4592445A (lv)
JP (1) JPH0340564Y2 (lv)
FR (1) FR2573132B1 (lv)
IT (1) IT1185931B (lv)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4787924A (en) * 1986-12-09 1988-11-29 Kioritz Corporation Air cleaner
US4936271A (en) * 1988-06-10 1990-06-26 Kioritz Corporation Portable powered working machine
US20020108698A1 (en) * 1998-05-19 2002-08-15 Daimlerchrysler Ag Trim part
WO2007081043A1 (en) * 2006-01-13 2007-07-19 Husqvarna Zenoah Co., Ltd. Chain saw
WO2007132914A1 (ja) 2006-05-17 2007-11-22 Husqvarna Zenoah Co., Ltd. 携帯型作業機
US20080164092A1 (en) * 2006-08-30 2008-07-10 Dolmar Gmbh Silencer with fin outlet
US20080277130A1 (en) * 2007-05-09 2008-11-13 Andreas Stihl Ag & Co. Kg Handheld work apparatus
US20090007438A1 (en) * 2006-01-13 2009-01-08 Husqvarna Zenoah Co., Ltd. Chain Saw
US20100083512A1 (en) * 2008-10-06 2010-04-08 Husqvarna Zenoah Co., Ltd. Chain saw
US20100083511A1 (en) * 2008-10-06 2010-04-08 Husqvarna Zenoah Co., Ltd. Chain saw
US20110030519A1 (en) * 2009-08-05 2011-02-10 Makita Corporation Pre-assemblable arrangement
US20120066916A1 (en) * 2010-09-18 2012-03-22 Georg Heinzelmann Handheld work apparatus
US20130239911A1 (en) * 2012-03-15 2013-09-19 Hitachi Koki Co., Ltd. Engine power tool

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3935361C2 (de) * 1989-10-24 1998-12-24 Stihl Maschf Andreas Arbeitsgerät wie Motorkettensäge oder dgl., insbesondere Einhandkettensäge
FR2716134B1 (fr) * 1994-02-11 1997-01-24 Stihl Andreas Instrument de travail à moteur, guidé manuellement et possédant une boîte de filtrage d'air de combustion.
DE4404465B4 (de) * 1994-02-11 2007-09-27 Fa. Andreas Stihl Handgeführtes Arbeitsgerät mit einem Filterkasten
JP5196163B2 (ja) * 2008-11-14 2013-05-15 日立工機株式会社 エンジン工具
JP5204086B2 (ja) * 2009-12-25 2013-06-05 株式会社丸山製作所 チェンソー

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525373A (en) * 1966-12-10 1970-08-25 Kyoritsu Noki Co Ltd Chain saw
US3542095A (en) * 1968-08-05 1970-11-24 Mcculloch Corp Chain saw with vibration isolation system
US3994067A (en) * 1972-11-14 1976-11-30 Mcculloch Corporation Apparatus for removing entrained matter from the inlet air of a chain saw internal combustion engine
US4136756A (en) * 1975-04-19 1979-01-30 Kawasaki Jukogyo Kabushiki Kaisha Suction air muffler for a motorcycle
US4254746A (en) * 1977-05-30 1981-03-10 Honda Giken Kogyo Kabushiki Kaisha Means silencing suction noise in internal combustion engines
US4261302A (en) * 1978-10-03 1981-04-14 Textron, Inc. Air cleaning system of internal combustion engine
US4286675A (en) * 1979-06-25 1981-09-01 Beaird-Poulan Division Of Emerson Electric Co. Narrow profile power handle for line trimmer and the like
US4302880A (en) * 1979-05-29 1981-12-01 Aktiebolaget Partner Engine regulator for a power saw
US4450933A (en) * 1982-09-24 1984-05-29 Kioritz Corporation Suction silencer

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955628A (en) * 1959-03-31 1960-10-11 Wensloff Allen Chain saw
DE1628927A1 (de) * 1967-09-22 1971-11-25 Zuendapp Werke Gmbh Motorkettensaege
US3881250A (en) * 1972-11-08 1975-05-06 Mcculloch Corp Chain saw filter assembly
JPS5520870Y2 (lv) * 1976-06-23 1980-05-19
JPS601161B2 (ja) * 1977-03-11 1985-01-12 新ダイワ工業株式会社 チエンソー

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525373A (en) * 1966-12-10 1970-08-25 Kyoritsu Noki Co Ltd Chain saw
US3542095A (en) * 1968-08-05 1970-11-24 Mcculloch Corp Chain saw with vibration isolation system
US3994067A (en) * 1972-11-14 1976-11-30 Mcculloch Corporation Apparatus for removing entrained matter from the inlet air of a chain saw internal combustion engine
US4136756A (en) * 1975-04-19 1979-01-30 Kawasaki Jukogyo Kabushiki Kaisha Suction air muffler for a motorcycle
US4254746A (en) * 1977-05-30 1981-03-10 Honda Giken Kogyo Kabushiki Kaisha Means silencing suction noise in internal combustion engines
US4261302A (en) * 1978-10-03 1981-04-14 Textron, Inc. Air cleaning system of internal combustion engine
US4302880A (en) * 1979-05-29 1981-12-01 Aktiebolaget Partner Engine regulator for a power saw
US4286675A (en) * 1979-06-25 1981-09-01 Beaird-Poulan Division Of Emerson Electric Co. Narrow profile power handle for line trimmer and the like
US4450933A (en) * 1982-09-24 1984-05-29 Kioritz Corporation Suction silencer

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4787924A (en) * 1986-12-09 1988-11-29 Kioritz Corporation Air cleaner
US4936271A (en) * 1988-06-10 1990-06-26 Kioritz Corporation Portable powered working machine
US20020108698A1 (en) * 1998-05-19 2002-08-15 Daimlerchrysler Ag Trim part
US20090007438A1 (en) * 2006-01-13 2009-01-08 Husqvarna Zenoah Co., Ltd. Chain Saw
WO2007081043A1 (en) * 2006-01-13 2007-07-19 Husqvarna Zenoah Co., Ltd. Chain saw
US8210134B2 (en) 2006-01-13 2012-07-03 Husqvarna Zenoah Co., Ltd. Chain saw
CN101365568B (zh) * 2006-01-13 2011-06-15 富世华智诺株式会社 链锯
US20090000130A1 (en) * 2006-01-13 2009-01-01 Husqvarn Zenoah Co., Ltd. Chain Saw
US8302579B2 (en) * 2006-05-17 2012-11-06 Husqvarna Zenoah Co., Ltd. Portable work machine
WO2007132914A1 (ja) 2006-05-17 2007-11-22 Husqvarna Zenoah Co., Ltd. 携帯型作業機
US20090235538A1 (en) * 2006-05-17 2009-09-24 Husqvarna Zenoah Co., Ltd. Portable Work Machine
EP2020490A1 (en) * 2006-05-17 2009-02-04 Husqvarna Zenoah Co., Ltd. Portable work machine
EP2020490A4 (en) * 2006-05-17 2010-07-14 Husqvarna Zenoah Co Ltd PORTABLE WORK MACHINE
US7775323B2 (en) * 2006-08-30 2010-08-17 Dolmar Gmbh Silencer with fin outlet
US20080164092A1 (en) * 2006-08-30 2008-07-10 Dolmar Gmbh Silencer with fin outlet
US7958946B2 (en) * 2007-05-09 2011-06-14 Andreas Stihl Ag & Co. Kg Handheld work apparatus
US20080277130A1 (en) * 2007-05-09 2008-11-13 Andreas Stihl Ag & Co. Kg Handheld work apparatus
US8794196B2 (en) 2008-10-06 2014-08-05 Husqvarna Zenoah Co., Ltd. Chain saw
US20100083511A1 (en) * 2008-10-06 2010-04-08 Husqvarna Zenoah Co., Ltd. Chain saw
US20100083512A1 (en) * 2008-10-06 2010-04-08 Husqvarna Zenoah Co., Ltd. Chain saw
US20110030519A1 (en) * 2009-08-05 2011-02-10 Makita Corporation Pre-assemblable arrangement
CN101992458A (zh) * 2009-08-05 2011-03-30 株式会社牧田 可预组装的装置
CN101992458B (zh) * 2009-08-05 2015-01-21 株式会社牧田 可预组装的装置
US8701792B2 (en) * 2009-08-05 2014-04-22 Makita Corporation Pre-assemblable arrangement
US20120066916A1 (en) * 2010-09-18 2012-03-22 Georg Heinzelmann Handheld work apparatus
US9138884B2 (en) * 2010-09-18 2015-09-22 Andreas Stihl Ag & Co. Kg Handheld work apparatus
US8800505B2 (en) * 2012-03-15 2014-08-12 Hitachi Koki Co., Ltd. Engine power tool
US20130239911A1 (en) * 2012-03-15 2013-09-19 Hitachi Koki Co., Ltd. Engine power tool

Also Published As

Publication number Publication date
JPS6162001U (lv) 1986-04-26
IT1185931B (it) 1987-11-18
FR2573132A1 (fr) 1986-05-16
IT8522174A0 (it) 1985-09-18
JPH0340564Y2 (lv) 1991-08-27
FR2573132B1 (fr) 1990-10-12

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Legal Events

Date Code Title Description
AS Assignment

Owner name: KOMATSU ZENOAH CO., 142-1, SAKURAGAOKA 2-CHOME, HI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SAWADA, TOSHIHARU;REEL/FRAME:004458/0378

Effective date: 19850902

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19940608

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362